Date   

Re: B&G Forward Scan Transducer Install

Jose Venegas
 

Alan, I agree with your observation.  One thing I found is that in the settings using the chart plotter one can vary an angle which I imagine is the difference between the true vertical and the sensor alignment which varies with the boat attitude caused by its motion and weight distribution.   Fiddling with that setting for a low motoring speed and calm waters makes the profile more stable and reliable. 

Jose G Venegas
Ipanema SM2K 278 


Re: B&G Forward Scan Transducer Install

Jose Venegas
 

Bill,
When I bought my boat it came with a B&G 40 mm ID depth sensor and it did not appear to have been changed before.  The B&G forward scanner that I bought had exactly that diameter and a length that was just enough to get in the perfect depth outside of the hull.

So, what I had and what I bought had exactly the same diameter.  I don't know why both sensors you mention have different diameters  

Jose G Venegas
Ipanema SM2K 278


Re: I ordered this on the 10 th from Amel

Randall SV ALBEDO
 

Circumnavigating the world, one part at a time.


On Thu, Feb 3, 2022 at 11:03 PM Eric Freedman <kimberlite@...> wrote:

This is unbelievable . Here is the FedEx tracking history to St Maarten – still not there.

Start at the bottom.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

Thursday, February 3, 2022
1:
42 AM MEMPHIS, TN
In transit
Wednesday, February 2, 2022
11:57 PM MEMPHIS, TN
Arrived at FedEx hub
8:50 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
4:40 AM NEWARK, NJ
In transit
4:39 AM NEWARK, NJ
Departed FedEx hub
Tuesday, February 1, 2022
8:13 PM NEWARK, NJ
Arrived at FedEx hub
4:59 PM MEMPHIS, TN
Departed FedEx hub
Sunday, January 30, 2022
5:02 AM MEMPHIS, TN
Arrived at FedEx hub
12:59 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
12:02 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Saturday, January 29, 2022
5:23 AM MEMPHIS, TN
In transit
5:13 AM MEMPHIS, TN
Departed FedEx hub
1:26 AM MEMPHIS, TN
In transit
Friday, January 28, 2022
8:42 PM MEMPHIS, TN
Arrived at FedEx hub
5:36 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:13 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Thursday, January 27, 2022
5:52 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:52 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:46 AM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
3:30 AM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
3:30 AM ROISSY CHARLES DE GAULLE CEDEX FR
Operational Delay
Wednesday, January 26, 2022
11:00 PM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
5:06 AM MEMPHIS, TN
In transit
4:32 AM MEMPHIS, TN
Departed FedEx hub
Tuesday, January 25, 2022
11:42 PM MEMPHIS, TN
In transit
4:23 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Monday, January 24, 2022
11:38 PM MEMPHIS, TN
Arrived at FedEx hub
8:27 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
8:20 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Sunday, January 23, 2022
7:06 PM MEMPHIS, TN
In transit
6:36 PM MEMPHIS, TN
Departed FedEx hub
Saturday, January 22, 2022
3:54 PM MEMPHIS, TN
In transit
4:07 AM MEMPHIS, TN
Arrived at FedEx hub
Friday, January 21, 2022
12:10 PM NEWARK, NJ
Departed FedEx hub
6:27 AM NEWARK, NJ
Arrived at FedEx hub
4:16 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Thursday, January 20, 2022
11:03 AM INDIANAPOLIS, IN
Departed FedEx hub
10:50 AM INDIANAPOLIS, IN
In transit
2:46 AM INDIANAPOLIS, IN
Arrived at FedEx hub
Wednesday, January 19, 2022
5:11 PM MEMPHIS, TN
Departed FedEx hub
7:23 AM MEMPHIS, TN
In transit
3:47 AM MEMPHIS, TN
In transit
1:56 AM MEMPHIS, TN
In transit
Package available for clearance
12:12 AM MEMPHIS, TN
Arrived at FedEx hub
Tuesday, January 18, 2022
2:39 PM COLE BAY SX
In transit
Thursday, January 13, 2022
7:58 PM COLE BAY SX
Delay
Rerouted to revised delivery address
9:08 AM COLE BAY SX
At local FedEx facility
Wednesday, January 12, 2022
8:23 PM COLE BAY SX
At local FedEx facility
5:58 PM COLE BAY SX
Clearance Delay
Held, cleared regulatory agency(s) after aircraft/ truck departed.
2:44 PM COLE BAY SX
In transit
12:30 PM CAROLINA, PR
In transit
10:38 AM CAROLINA, PR
At destination sort facility
5:09 AM MEMPHIS, TN
Departed FedEx hub
2:06 AM MEMPHIS, TN
In transit
Tuesday, January 11, 2022
3:47 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Package available for clearance
12:33 AM ROISSY CHARLES DE GAULLE CEDEX FR
International shipment release - Export
Monday, January 10, 2022
6:54 PM CHASSENEUIL DU POITOU FR
Left FedEx origin facility
4:08 PM PERIGNY FR
Picked up
4:07 PM CHASSENEUIL DU POITOU FR
In transit
7:52 AM
Shipment information sent to FedEx


Re: I ordered this on the 10 th from Amel

Danny and Yvonne SIMMS
 

That's bad. My delivery from LA Rochelle to New Zeand just over a week.
Danny

On 04/02/2022 17:02 Eric Freedman <kimberlite@...> wrote:


This is unbelievable . Here is the FedEx tracking history to St Maarten – still not there.

Start at the bottom.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

Thursday, February 3, 2022
1:
42 AM MEMPHIS, TN
In transit
Wednesday, February 2, 2022
11:57 PM MEMPHIS, TN
Arrived at FedEx hub
8:50 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
4:40 AM NEWARK, NJ
In transit
4:39 AM NEWARK, NJ
Departed FedEx hub
Tuesday, February 1, 2022
8:13 PM NEWARK, NJ
Arrived at FedEx hub
4:59 PM MEMPHIS, TN
Departed FedEx hub
Sunday, January 30, 2022
5:02 AM MEMPHIS, TN
Arrived at FedEx hub
12:59 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
12:02 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Saturday, January 29, 2022
5:23 AM MEMPHIS, TN
In transit
5:13 AM MEMPHIS, TN
Departed FedEx hub
1:26 AM MEMPHIS, TN
In transit
Friday, January 28, 2022
8:42 PM MEMPHIS, TN
Arrived at FedEx hub
5:36 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:13 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Thursday, January 27, 2022
5:52 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:52 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:46 AM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
3:30 AM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
3:30 AM ROISSY CHARLES DE GAULLE CEDEX FR
Operational Delay
Wednesday, January 26, 2022
11:00 PM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
5:06 AM MEMPHIS, TN
In transit
4:32 AM MEMPHIS, TN
Departed FedEx hub
Tuesday, January 25, 2022
11:42 PM MEMPHIS, TN
In transit
4:23 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Monday, January 24, 2022
11:38 PM MEMPHIS, TN
Arrived at FedEx hub
8:27 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
8:20 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Sunday, January 23, 2022
7:06 PM MEMPHIS, TN
In transit
6:36 PM MEMPHIS, TN
Departed FedEx hub
Saturday, January 22, 2022
3:54 PM MEMPHIS, TN
In transit
4:07 AM MEMPHIS, TN
Arrived at FedEx hub
Friday, January 21, 2022
12:10 PM NEWARK, NJ
Departed FedEx hub
6:27 AM NEWARK, NJ
Arrived at FedEx hub
4:16 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Thursday, January 20, 2022
11:03 AM INDIANAPOLIS, IN
Departed FedEx hub
10:50 AM INDIANAPOLIS, IN
In transit
2:46 AM INDIANAPOLIS, IN
Arrived at FedEx hub
Wednesday, January 19, 2022
5:11 PM MEMPHIS, TN
Departed FedEx hub
7:23 AM MEMPHIS, TN
In transit
3:47 AM MEMPHIS, TN
In transit
1:56 AM MEMPHIS, TN
In transit
Package available for clearance
12:12 AM MEMPHIS, TN
Arrived at FedEx hub
Tuesday, January 18, 2022
2:39 PM COLE BAY SX
In transit
Thursday, January 13, 2022
7:58 PM COLE BAY SX
Delay
Rerouted to revised delivery address
9:08 AM COLE BAY SX
At local FedEx facility
Wednesday, January 12, 2022
8:23 PM COLE BAY SX
At local FedEx facility
5:58 PM COLE BAY SX
Clearance Delay
Held, cleared regulatory agency(s) after aircraft/ truck departed.
2:44 PM COLE BAY SX
In transit
12:30 PM CAROLINA, PR
In transit
10:38 AM CAROLINA, PR
At destination sort facility
5:09 AM MEMPHIS, TN
Departed FedEx hub
2:06 AM MEMPHIS, TN
In transit
Tuesday, January 11, 2022
3:47 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Package available for clearance
12:33 AM ROISSY CHARLES DE GAULLE CEDEX FR
International shipment release - Export
Monday, January 10, 2022
6:54 PM CHASSENEUIL DU POITOU FR
Left FedEx origin facility
4:08 PM PERIGNY FR
Picked up
4:07 PM CHASSENEUIL DU POITOU FR
In transit
7:52 AM
Shipment information sent to FedEx


I ordered this on the 10 th from Amel

Eric Freedman <kimberlite@...>
 

This is unbelievable . Here is the FedEx tracking history to St Maarten – still not there.

Start at the bottom.

Fair Winds

Eric

Kimberlite Amel Super Maramu #376

 

 

 

Thursday, February 3, 2022
1:
42 AM MEMPHIS, TN
In transit
Wednesday, February 2, 2022
11:57 PM MEMPHIS, TN
Arrived at FedEx hub
8:50 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
4:40 AM NEWARK, NJ
In transit
4:39 AM NEWARK, NJ
Departed FedEx hub
Tuesday, February 1, 2022
8:13 PM NEWARK, NJ
Arrived at FedEx hub
4:59 PM MEMPHIS, TN
Departed FedEx hub
Sunday, January 30, 2022
5:02 AM MEMPHIS, TN
Arrived at FedEx hub
12:59 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
12:02 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Saturday, January 29, 2022
5:23 AM MEMPHIS, TN
In transit
5:13 AM MEMPHIS, TN
Departed FedEx hub
1:26 AM MEMPHIS, TN
In transit
Friday, January 28, 2022
8:42 PM MEMPHIS, TN
Arrived at FedEx hub
5:36 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:13 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Thursday, January 27, 2022
5:52 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:52 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
5:46 AM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
3:30 AM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
3:30 AM ROISSY CHARLES DE GAULLE CEDEX FR
Operational Delay
Wednesday, January 26, 2022
11:00 PM ROISSY CHARLES DE GAULLE CEDEX FR
At local FedEx facility
5:06 AM MEMPHIS, TN
In transit
4:32 AM MEMPHIS, TN
Departed FedEx hub
Tuesday, January 25, 2022
11:42 PM MEMPHIS, TN
In transit
4:23 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Monday, January 24, 2022
11:38 PM MEMPHIS, TN
Arrived at FedEx hub
8:27 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
8:20 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Sunday, January 23, 2022
7:06 PM MEMPHIS, TN
In transit
6:36 PM MEMPHIS, TN
Departed FedEx hub
Saturday, January 22, 2022
3:54 PM MEMPHIS, TN
In transit
4:07 AM MEMPHIS, TN
Arrived at FedEx hub
Friday, January 21, 2022
12:10 PM NEWARK, NJ
Departed FedEx hub
6:27 AM NEWARK, NJ
Arrived at FedEx hub
4:16 AM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Thursday, January 20, 2022
11:03 AM INDIANAPOLIS, IN
Departed FedEx hub
10:50 AM INDIANAPOLIS, IN
In transit
2:46 AM INDIANAPOLIS, IN
Arrived at FedEx hub
Wednesday, January 19, 2022
5:11 PM MEMPHIS, TN
Departed FedEx hub
7:23 AM MEMPHIS, TN
In transit
3:47 AM MEMPHIS, TN
In transit
1:56 AM MEMPHIS, TN
In transit
Package available for clearance
12:12 AM MEMPHIS, TN
Arrived at FedEx hub
Tuesday, January 18, 2022
2:39 PM COLE BAY SX
In transit
Thursday, January 13, 2022
7:58 PM COLE BAY SX
Delay
Rerouted to revised delivery address
9:08 AM COLE BAY SX
At local FedEx facility
Wednesday, January 12, 2022
8:23 PM COLE BAY SX
At local FedEx facility
5:58 PM COLE BAY SX
Clearance Delay
Held, cleared regulatory agency(s) after aircraft/ truck departed.
2:44 PM COLE BAY SX
In transit
12:30 PM CAROLINA, PR
In transit
10:38 AM CAROLINA, PR
At destination sort facility
5:09 AM MEMPHIS, TN
Departed FedEx hub
2:06 AM MEMPHIS, TN
In transit
Tuesday, January 11, 2022
3:47 PM ROISSY CHARLES DE GAULLE CEDEX FR
In transit
Package available for clearance
12:33 AM ROISSY CHARLES DE GAULLE CEDEX FR
International shipment release - Export
Monday, January 10, 2022
6:54 PM CHASSENEUIL DU POITOU FR
Left FedEx origin facility
4:08 PM PERIGNY FR
Picked up
4:07 PM CHASSENEUIL DU POITOU FR
In transit
7:52 AM
Shipment information sent to FedEx


Re: Rudder Post Packing #replacement

 

image.png


On Thu, Feb 3, 2022 at 3:03 PM Randall Walker <sailingalbedo@...> wrote:
Hello all,
Picking up all the new rudder post packing from the local marine store here in Canada for my 54,
This is my first repacking of the leaking and need to know the size of the packing material.
Randall
A54#56


Re: Introduction

Martijn BoIt
 

Thanks a lot for this Brent! This one keeps me busy as I keep re-reading this 'entertaining' post. HaHa.
It has a ton of information and a host of new words I can add to my vocabulary. :-D

Cheers, Martijn


Re: Firefly Battery Update.

Michael Winand
 

Hi Bill, we have the same batteries, have not yet done the restoration charge, will be soon. 
I have some questions,  did you split the bank into  two, to get a higher charge rate,  also I am looking to turn off the refrigeration to not run them on the low voltage when draining the battery bank?
I have a victron quattro that is a 120amp charger. 
Michael Nebo sm251

On Thu, 3 Feb 2022, 3:42 pm Porter McRoberts via groups.io, <portermcroberts=yahoo.com@groups.io> wrote:
Wow. Great Intel Bill. Thank you 

Makes one rethink lithium in light of the insurance issues.   Or at least consider the firefly a greatly improved bridge to wait for insurers to figure out the low risk reality of lithium. 


Appreciated, 
Porter McRoberts 
S/V IBIS A54-152
WhatsApp:+1 754 265 2206

On Feb 3, 2022, at 2:27 PM, Bill Kinney <cruisingconsulting@...> wrote:




We have had some pretty extensive experience with our Firefly batteries at this point.  We had a couple lumps and bumps in the road early on, but things now seem to have settled in to good smooth operation. One of the unusual things about using a Firefly battery is the procedure Firefly calls a “Restoration charge.” After an extended period of operating at partial state of charge, to restore full capacity the recommendation...



...perform the restoration charge: charge the G31 to 14.4V at 0.2C to 0.5C and continue to charge until the current drops to 0.5 A on the G31  and apply a float charge of 13.5V( for 24 hours. Fully discharge the battery to 10.5V, and then repeat the same charge cycle.

This is also the perfect time to actually measure the capacity of our batteries, and monitor their health since we are discharging them from 100% full to as close to 0% as you can get. For our battery bank we do this by turning on a 1000 Watt space heater, which pulls about 50 Amps out of our 480 Amp-hour battery bank draining them fully in a little under 10 hours.

 

For our 480 Amp-hour battery bank Firefly’s minimum recommended charger capacity is 96 Amps, and a maximum of 240 Amps, with an optimum target of 192 Amps.  Our DC generator puts out 150 Amps, and our shore power inverter/charger does 70 Amps.  

 

In Early October 2020 we installed our current set of Firefly batteries.  After installation, initial charging and testing we did a full ”restoration charge” bringing the batteries from 100% full, down to dead flat, and recharging at 200 Amps

 

Firefly’s current specification sheet for the G31 version of their batteries lists the C10 capacity as 448 Amp-hours.  Our first test in Oct 2020 came in at 454 Amp-hours. It seemed we were off to an excellent start.  Our batteries managed to supply about 1% above rated capacity.

 

In April 21 after 6 months of use, we again ran a full discharge test, and the result was 459 Amp-hours. Even better!  Obviously this was not a trend that could continue for long…

 

In Sep 21 after 10 months another test:  453 Amp-Hours.

 

Jan 22 at 15 months: 448 Amp Hours, right on the original rated nameplate capacity.

 

I do not have any feeling for how precise these numbers are.  Are they +/- 1% or 10%?  No idea.  The measurement is a bit dicey, since I certainly do not have laboratory grade control of the discharge rate.  So I can’t yet say if there is a real trend here or not.  But the (very!) good news for us is after 15 months of constant use our batteries test out right at the original manufacturer’s capacity specification, or a tiny bit better!

 

Considering that an inexpensive set of flooded lead acid batteries would be approaching the end of their useful life at this age, we count this as a total win.  Will these batteries last long enough to justify the additional cost?  Maybe.  Maybe not.  But they are certainly on the right track.

 

For the way we use our boat, the performance of these seems to be an excellent match. 


Bill Kinney
SM160, Harmonie
Hollywood, FL, USA


Re: Firefly Battery Update.

Arno Luijten
 

Hi Bill,

Good to hear you have positive experiences with Firefly. Regrettably mine are not so positive as I had 8 of them in our Amel 54 but they were not up for the task. The voltage was getting below 24 V when the SOC came below 60-65% and we had any kind of load on the system (fridges mainly). In my case the internal resistance of the batteries seemed fairly high as the voltage dropped significant even at loads in the region of 10-25A.
The guys from Firefly sent me a diagram that made it clear to me that these batteries are typically 0.2 V below AGM batteries and any SOC. After some discussion with them they basically told me these batteries were not suitable for my use-case.
So for me this meant an usable capacity of about 120-150 Ah, not great on a power-hungry Amel 54.
So after a year I decided to replace the batteries with 24V lithium units. Safe to say this was a very expensive experience.

Regards,
Arno Luijten
SV Luna,
A54-121


Rudder Post Packing #replacement

Randall SV ALBEDO
 

Hello all,
Picking up all the new rudder post packing from the local marine store here in Canada for my 54,
This is my first repacking of the leaking and need to know the size of the packing material.
Randall
A54#56


Re: B&G Forward Scan Transducer Install

 

Jose,

I read your posting with interest and I have an important question.

The B&G pecs on the Forward Scanner state it requires a 50.8 mm hole. The B&G Depth Sounder that came with your SM requires a 32 mm hole. Apparently, the Depth Transducer on your SM was changed and the hole enlarged before you bought her. Can you confirm this?
image.png

image.png


On Thu, Feb 3, 2022 at 1:15 PM Jose Venegas via groups.io <josegvenegas=icloud.com@groups.io> wrote:
Matt,
I installed the B&G forward scanner in place of the original B&G depth scanner and it fit perfectly. I mounted the old depth scanner behind the forward scanner To avoid having to make a new hole on the hull, I mounted the old scanner on a plastic tube that was glued with silicone to the hull and partially filled with water to create a transmission media for the ultrasound. Once in a while I need to put some water as it evaporates in over time.
The only thing that I need to do for the old scanner to work is to start it before the forward scanner.  If I forget that, I can go to the chart plotter and temporarily suspend the forward scanner until the depth scanner starts.  After that both scanners work.  It is great to have the redundant information when you are entering unchartered areas.

To protect the forward scanner I fabricated a nest of 2 stainless rods aligned in the direction of the boat and screw it to the hull.  I may still be hit by debris but less likely be damaged.

Jose Venegas
Ipanema SM2K 278
Currently in Redfrog marina, panama.





Re: B&G Forward Scan Transducer Install

Jose Venegas
 

Matt,
I installed the B&G forward scanner in place of the original B&G depth scanner and it fit perfectly. I mounted the old depth scanner behind the forward scanner To avoid having to make a new hole on the hull, I mounted the old scanner on a plastic tube that was glued with silicone to the hull and partially filled with water to create a transmission media for the ultrasound. Once in a while I need to put some water as it evaporates in over time.
The only thing that I need to do for the old scanner to work is to start it before the forward scanner. If I forget that, I can go to the chart plotter and temporarily suspend the forward scanner until the depth scanner starts. After that both scanners work. It is great to have the redundant information when you are entering unchartered areas.

To protect the forward scanner I fabricated a nest of 2 stainless rods aligned in the direction of the boat and screw it to the hull. I may still be hit by debris but less likely be damaged.

Jose Venegas
Ipanema SM2K 278
Currently in Redfrog marina, panama.


Re: Silicone Bowthruster Seals Wanted !!

JOSE PRIETO
 

I need the silicone selas as well, in Europe.

Thanks

JP
--
Jose Prieto
SV Wayag, SM 323
Currently AguaDulce, Spain


Silicone Bowthruster Seals Wanted !!

George Green
 

Does anyone have a set of seals available for  sale suitable for my SM2K ?
No rush. I will be in the USA  until end June and Greece for the rest of the year

Many thanks in advance

George
on COCO,  # 434


Re: Firefly Battery Update.

Porter McRoberts
 

Wow. Great Intel Bill. Thank you 

Makes one rethink lithium in light of the insurance issues.   Or at least consider the firefly a greatly improved bridge to wait for insurers to figure out the low risk reality of lithium. 


Appreciated, 
Porter McRoberts 
S/V IBIS A54-152
WhatsApp:+1 754 265 2206
Www.fouribis.net

On Feb 3, 2022, at 2:27 PM, Bill Kinney <cruisingconsulting@...> wrote:




We have had some pretty extensive experience with our Firefly batteries at this point.  We had a couple lumps and bumps in the road early on, but things now seem to have settled in to good smooth operation. One of the unusual things about using a Firefly battery is the procedure Firefly calls a “Restoration charge.” After an extended period of operating at partial state of charge, to restore full capacity the recommendation...



...perform the restoration charge: charge the G31 to 14.4V at 0.2C to 0.5C and continue to charge until the current drops to 0.5 A on the G31  and apply a float charge of 13.5V( for 24 hours. Fully discharge the battery to 10.5V, and then repeat the same charge cycle.

This is also the perfect time to actually measure the capacity of our batteries, and monitor their health since we are discharging them from 100% full to as close to 0% as you can get. For our battery bank we do this by turning on a 1000 Watt space heater, which pulls about 50 Amps out of our 480 Amp-hour battery bank draining them fully in a little under 10 hours.

 

For our 480 Amp-hour battery bank Firefly’s minimum recommended charger capacity is 96 Amps, and a maximum of 240 Amps, with an optimum target of 192 Amps.  Our DC generator puts out 150 Amps, and our shore power inverter/charger does 70 Amps.  

 

In Early October 2020 we installed our current set of Firefly batteries.  After installation, initial charging and testing we did a full ”restoration charge” bringing the batteries from 100% full, down to dead flat, and recharging at 200 Amps

 

Firefly’s current specification sheet for the G31 version of their batteries lists the C10 capacity as 448 Amp-hours.  Our first test in Oct 2020 came in at 454 Amp-hours. It seemed we were off to an excellent start.  Our batteries managed to supply about 1% above rated capacity.

 

In April 21 after 6 months of use, we again ran a full discharge test, and the result was 459 Amp-hours. Even better!  Obviously this was not a trend that could continue for long…

 

In Sep 21 after 10 months another test:  453 Amp-Hours.

 

Jan 22 at 15 months: 448 Amp Hours, right on the original rated nameplate capacity.

 

I do not have any feeling for how precise these numbers are.  Are they +/- 1% or 10%?  No idea.  The measurement is a bit dicey, since I certainly do not have laboratory grade control of the discharge rate.  So I can’t yet say if there is a real trend here or not.  But the (very!) good news for us is after 15 months of constant use our batteries test out right at the original manufacturer’s capacity specification, or a tiny bit better!

 

Considering that an inexpensive set of flooded lead acid batteries would be approaching the end of their useful life at this age, we count this as a total win.  Will these batteries last long enough to justify the additional cost?  Maybe.  Maybe not.  But they are certainly on the right track.

 

For the way we use our boat, the performance of these seems to be an excellent match. 


Bill Kinney
SM160, Harmonie
Hollywood, FL, USA


Firefly Battery Update.

Bill Kinney
 


We have had some pretty extensive experience with our Firefly batteries at this point.  We had a couple lumps and bumps in the road early on, but things now seem to have settled in to good smooth operation. One of the unusual things about using a Firefly battery is the procedure Firefly calls a “Restoration charge.” After an extended period of operating at partial state of charge, to restore full capacity the recommendation...



...perform the restoration charge: charge the G31 to 14.4V at 0.2C to 0.5C and continue to charge until the current drops to 0.5 A on the G31  and apply a float charge of 13.5V( for 24 hours. Fully discharge the battery to 10.5V, and then repeat the same charge cycle.

This is also the perfect time to actually measure the capacity of our batteries, and monitor their health since we are discharging them from 100% full to as close to 0% as you can get. For our battery bank we do this by turning on a 1000 Watt space heater, which pulls about 50 Amps out of our 480 Amp-hour battery bank draining them fully in a little under 10 hours.

 

For our 480 Amp-hour battery bank Firefly’s minimum recommended charger capacity is 96 Amps, and a maximum of 240 Amps, with an optimum target of 192 Amps.  Our DC generator puts out 150 Amps, and our shore power inverter/charger does 70 Amps.  

 

In Early October 2020 we installed our current set of Firefly batteries.  After installation, initial charging and testing we did a full ”restoration charge” bringing the batteries from 100% full, down to dead flat, and recharging at 200 Amps

 

Firefly’s current specification sheet for the G31 version of their batteries lists the C10 capacity as 448 Amp-hours.  Our first test in Oct 2020 came in at 454 Amp-hours. It seemed we were off to an excellent start.  Our batteries managed to supply about 1% above rated capacity.

 

In April 21 after 6 months of use, we again ran a full discharge test, and the result was 459 Amp-hours. Even better!  Obviously this was not a trend that could continue for long…

 

In Sep 21 after 10 months another test:  453 Amp-Hours.

 

Jan 22 at 15 months: 448 Amp Hours, right on the original rated nameplate capacity.

 

I do not have any feeling for how precise these numbers are.  Are they +/- 1% or 10%?  No idea.  The measurement is a bit dicey, since I certainly do not have laboratory grade control of the discharge rate.  So I can’t yet say if there is a real trend here or not.  But the (very!) good news for us is after 15 months of constant use our batteries test out right at the original manufacturer’s capacity specification, or a tiny bit better!

 

Considering that an inexpensive set of flooded lead acid batteries would be approaching the end of their useful life at this age, we count this as a total win.  Will these batteries last long enough to justify the additional cost?  Maybe.  Maybe not.  But they are certainly on the right track.

 

For the way we use our boat, the performance of these seems to be an excellent match. 


Bill Kinney
SM160, Harmonie
Hollywood, FL, USA


Re: Amel Maramu replacement waterlock

JB Duler
 

Richard, it may be simply catastrophic. Amel owners have lost their engine over saltwater back in the engine, especially during long downwind runs
--
John Bernard "JB" Duler
San Francisco
Meltem # 19, Western Med


Re: Fresh water tank pipe noise

Scott SV Tengah
 

I had that sound after the aft most water tank section on my 54 was cleaned. The copper pipe was pushed close to the vertical face of the tank by a monkey fisted boatyard worker during the cleaning process.

A little gentle bending got it far enough away that it doesn't touch anymore. 

--
Scott 
2007 A54 #69
SV Tengah
http://www.svtengah.com


Re: Amel Maramu replacement waterlock

Richard May
 

Bill,
Interesting intel on the muffler.  Thank you.  The muffler I have also does not have a backflow preventer in it like the LSG models do.  Are there ever issues with seawater coming backwards in the systems?
--
Richard May
SM 477 Avogato


Re: DOES ANYONE KNOW WHY THE EMAILS i POST TO THE GROUP DO NOT SHOW UP?

Danny and Yvonne SIMMS
 

Thanks JB. I'm not too worried. I just checked my spam folder.
Danny

On 02/02/2022 13:04 JB Duler <jbduler@...> wrote:


Danny, most of the time the problem is not at the source but at the reception.

I don't know what Bill is using as an email service (Amazon SES? Mailgun? Sengrid?). But it works very well.

Email is way more complex than we tend to think. And it works well most of the time.
Who is handling the email for the domain xtra.co.nz? It may have worked in the past but very few email providers (beyond Microsoft and Gmail) have been able to keep up with tech. Don't forget that they have now to deal with billions of spam emails and they do an excellent job.

A solution is maybe to open a different email like dannyYvonneSimms@...?
--
John Bernard "JB" Duler
San Francisco
Meltem # 19, Western Med